2 * Copyright (c) 1980, 1992, 1993
3 * The Regents of the University of California. All rights reserved.
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15 * This product includes software developed by the University of
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33 * @(#)netstat.c 8.1 (Berkeley) 6/6/93
34 * $FreeBSD: src/usr.bin/systat/netstat.c,v 1.13 1999/08/30 08:18:08 peter Exp $
35 * $DragonFly: src/usr.bin/systat/netstat.c,v 1.3 2003/10/04 20:36:51 hmp Exp $
41 #include <sys/param.h>
42 #include <sys/queue.h>
43 #include <sys/socket.h>
44 #include <sys/socketvar.h>
45 #include <sys/protosw.h>
47 #include <netinet/in.h>
48 #include <arpa/inet.h>
49 #include <net/route.h>
50 #include <netinet/in_systm.h>
51 #include <netinet/ip.h>
52 #include <netinet/in_pcb.h>
53 #include <netinet/ip_icmp.h>
54 #include <netinet/icmp_var.h>
55 #include <netinet/ip_var.h>
56 #include <netinet/tcp.h>
57 #include <netinet/tcpip.h>
58 #include <netinet/tcp_seq.h>
60 #include <netinet/tcp_fsm.h>
61 #include <netinet/tcp_timer.h>
62 #include <netinet/tcp_var.h>
63 #include <netinet/tcp_debug.h>
64 #include <netinet/udp.h>
65 #include <netinet/udp_var.h>
75 static void enter(struct inpcb *, struct socket *, int, char *);
76 static char *inetname(struct in_addr);
77 static void inetprint(struct in_addr *, int, char *);
79 #define streq(a,b) (strcmp(a,b)==0)
80 #define YMAX(w) ((w)->_maxy-1)
87 return (subwin(stdscr, LINES-5-1, 0, 5, 0));
91 struct netinfo *ni_forw, *ni_prev;
92 short ni_line; /* line on screen */
93 short ni_seen; /* 0 when not present in list */
95 #define NIF_LACHG 0x1 /* local address changed */
96 #define NIF_FACHG 0x2 /* foreign address changed */
97 short ni_state; /* tcp state */
98 char *ni_proto; /* protocol */
99 struct in_addr ni_laddr; /* local address */
100 long ni_lport; /* local port */
101 struct in_addr ni_faddr; /* foreign address */
102 long ni_fport; /* foreign port */
103 long ni_rcvcc; /* rcv buffer character count */
104 long ni_sndcc; /* snd buffer character count */
108 struct netinfo *ni_forw, *ni_prev;
111 static int aflag = 0;
112 static int nflag = 0;
113 static int lastrow = 1;
114 static void enter(), inetprint();
115 static char *inetname();
118 closenetstat(WINDOW *w)
120 register struct netinfo *p;
124 p = (struct netinfo *)netcb.ni_forw;
125 while (p != (struct netinfo *)&netcb) {
126 if (p->ni_line != -1)
138 static struct nlist namelist[] = {
149 if (kvm_nlist(kd, namelist)) {
153 if (namelist[X_TCB].n_value == 0) {
154 error("No symbols in namelist");
157 netcb.ni_forw = netcb.ni_prev = (struct netinfo *)&netcb;
165 register struct inpcb *next;
166 register struct netinfo *p;
167 struct inpcbhead head;
174 if (namelist[X_TCB].n_value == 0)
176 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw)
182 else if (protos&UDP) {
187 error("No protocols to display");
191 KREAD(off, &head, sizeof (struct inpcbhead));
192 for (next = head.lh_first; next != NULL; next = inpcb.inp_list.le_next) {
193 KREAD(next, &inpcb, sizeof (inpcb));
194 if (!aflag && inet_lnaof(inpcb.inp_laddr) == INADDR_ANY)
196 if (nhosts && !checkhost(&inpcb))
198 if (nports && !checkport(&inpcb))
200 KREAD(inpcb.inp_socket, &sockb, sizeof (sockb));
202 KREAD(inpcb.inp_ppcb, &tcpcb, sizeof (tcpcb));
203 enter(&inpcb, &sockb, tcpcb.t_state, "tcp");
205 enter(&inpcb, &sockb, 0, "udp");
207 if (istcp && (protos&UDP)) {
215 enter(register struct inpcb *inp, register struct socket *so, int state,
218 register struct netinfo *p;
221 * Only take exact matches, any sockets with
222 * previously unbound addresses will be deleted
223 * below in the display routine because they
224 * will appear as ``not seen'' in the kernel
227 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
228 if (!streq(proto, p->ni_proto))
230 if (p->ni_lport != inp->inp_lport ||
231 p->ni_laddr.s_addr != inp->inp_laddr.s_addr)
233 if (p->ni_faddr.s_addr == inp->inp_faddr.s_addr &&
234 p->ni_fport == inp->inp_fport)
237 if (p == (struct netinfo *)&netcb) {
238 if ((p = malloc(sizeof(*p))) == NULL) {
239 error("Out of memory");
242 p->ni_prev = (struct netinfo *)&netcb;
243 p->ni_forw = netcb.ni_forw;
244 netcb.ni_forw->ni_prev = p;
247 p->ni_laddr = inp->inp_laddr;
248 p->ni_lport = inp->inp_lport;
249 p->ni_faddr = inp->inp_faddr;
250 p->ni_fport = inp->inp_fport;
252 p->ni_flags = NIF_LACHG|NIF_FACHG;
254 p->ni_rcvcc = so->so_rcv.sb_cc;
255 p->ni_sndcc = so->so_snd.sb_cc;
260 /* column locations */
262 #define FADDR LADDR+23
263 #define PROTO FADDR+23
264 #define RCVCC PROTO+6
265 #define SNDCC RCVCC+7
266 #define STATE SNDCC+7
272 if (namelist[X_TCB].n_type == 0)
274 wmove(wnd, 0, 0); wclrtobot(wnd);
275 mvwaddstr(wnd, 0, LADDR, "Local Address");
276 mvwaddstr(wnd, 0, FADDR, "Foreign Address");
277 mvwaddstr(wnd, 0, PROTO, "Proto");
278 mvwaddstr(wnd, 0, RCVCC, "Recv-Q");
279 mvwaddstr(wnd, 0, SNDCC, "Send-Q");
280 mvwaddstr(wnd, 0, STATE, "(state)");
286 register struct netinfo *p, *q;
289 * First, delete any connections that have gone
290 * away and adjust the position of connections
291 * below to reflect the deleted line.
294 while (p != (struct netinfo *)&netcb) {
295 if (p->ni_line == -1 || p->ni_seen) {
299 wmove(wnd, p->ni_line, 0); wdeleteln(wnd);
301 for (; q != (struct netinfo *)&netcb; q = q->ni_forw)
302 if (q != p && q->ni_line > p->ni_line) {
304 /* this shouldn't be necessary */
305 q->ni_flags |= NIF_LACHG|NIF_FACHG;
309 p->ni_prev->ni_forw = p->ni_forw;
310 p->ni_forw->ni_prev = p->ni_prev;
315 * Update existing connections and add new ones.
317 for (p = netcb.ni_forw; p != (struct netinfo *)&netcb; p = p->ni_forw) {
318 if (p->ni_line == -1) {
320 * Add a new entry if possible.
322 if (lastrow > YMAX(wnd))
324 p->ni_line = lastrow++;
325 p->ni_flags |= NIF_LACHG|NIF_FACHG;
327 if (p->ni_flags & NIF_LACHG) {
328 wmove(wnd, p->ni_line, LADDR);
329 inetprint(&p->ni_laddr, p->ni_lport, p->ni_proto);
330 p->ni_flags &= ~NIF_LACHG;
332 if (p->ni_flags & NIF_FACHG) {
333 wmove(wnd, p->ni_line, FADDR);
334 inetprint(&p->ni_faddr, p->ni_fport, p->ni_proto);
335 p->ni_flags &= ~NIF_FACHG;
337 mvwaddstr(wnd, p->ni_line, PROTO, p->ni_proto);
338 mvwprintw(wnd, p->ni_line, RCVCC, "%6d", p->ni_rcvcc);
339 mvwprintw(wnd, p->ni_line, SNDCC, "%6d", p->ni_sndcc);
340 if (streq(p->ni_proto, "tcp"))
341 if (p->ni_state < 0 || p->ni_state >= TCP_NSTATES)
342 mvwprintw(wnd, p->ni_line, STATE, "%d",
345 mvwaddstr(wnd, p->ni_line, STATE,
346 tcpstates[p->ni_state]);
349 if (lastrow < YMAX(wnd)) {
350 wmove(wnd, lastrow, 0); wclrtobot(wnd);
351 wmove(wnd, YMAX(wnd), 0); wdeleteln(wnd); /* XXX */
356 * Pretty print an Internet address (net address + port).
357 * If the nflag was specified, use numbers instead of names.
360 inetprint(register struct in_addr *in, int port, char *proto)
362 struct servent *sp = 0;
363 char line[80], *cp, *index();
365 snprintf(line, sizeof(line), "%.*s.", 16, inetname(*in));
366 cp = index(line, '\0');
368 sp = getservbyport(port, proto);
370 snprintf(cp, sizeof(line) - (cp - line), "%.8s",
371 sp ? sp->s_name : "*");
373 snprintf(cp, sizeof(line) - (cp - line), "%d",
374 ntohs((u_short)port));
375 /* pad to full column to clear any garbage */
376 cp = index(line, '\0');
377 while (cp - line < 22)
384 * Construct an Internet address representation.
385 * If the nflag has been supplied, give
386 * numeric value, otherwise try for symbolic name.
389 inetname(struct in_addr in)
392 static char line[50];
396 if (!nflag && in.s_addr != INADDR_ANY) {
397 int net = inet_netof(in);
398 int lna = inet_lnaof(in);
400 if (lna == INADDR_ANY) {
401 np = getnetbyaddr(net, AF_INET);
406 hp = gethostbyaddr((char *)&in, sizeof (in), AF_INET);
411 if (in.s_addr == INADDR_ANY)
414 snprintf(line, sizeof(line), "%s", cp);
416 in.s_addr = ntohl(in.s_addr);
417 #define C(x) ((x) & 0xff)
418 snprintf(line, sizeof(line), "%u.%u.%u.%u", C(in.s_addr >> 24),
419 C(in.s_addr >> 16), C(in.s_addr >> 8), C(in.s_addr));
425 cmdnetstat(char *cmd, char *args)
427 register struct netinfo *p;
429 if (prefix(cmd, "all")) {
433 if (prefix(cmd, "numbers") || prefix(cmd, "names")) {
436 new = prefix(cmd, "numbers");
440 for (; p != (struct netinfo *)&netcb; p = p->ni_forw) {
441 if (p->ni_line == -1)
443 p->ni_flags |= NIF_LACHG|NIF_FACHG;
448 if (!netcmd(cmd, args))